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arXiv 0804.3975math.NAcs.NAmath.AP
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非均匀介质中的真振幅单向传播

True amplitude one-way propagation in heterogeneous media

INSTITUT NATIONAL DE RECHERCHE EN INFORMATIQUE ET EN AUTOMATIQUE(法国国家信息与自动化研究所)

Hélène Barucq, Bertrand Duquet, Frank Prat

AI总结:

本文对M.V. De Hoop提出的两种单向系统进行数值分析,比较了包含修正项以提高数值解振幅的两种公式,发现理论等价但在强不连续介质中数值表现不同。

摘要:

本文涉及对由M.V. De Hoop提出的通用完整模型导出的两种单向系统的数值分析。这项工作的主要目标是比较两种不同的公式,其中修正项可以改善数值解的振幅。结果表明,即使这两个系统在理论上是等价的,但在数值模拟方面却并非如此。本文进行了数值分析,以表明只要传播介质是光滑的,两种模型是等价的,但当介质与相当强的间断速度相关时,情况就不再如此。

英文摘要:

This paper deals with the numerical analysis of two one-way systems derived from the general complete modeling proposed by M.V. De Hoop. The main goal of this work is to compare two different formulations in which a correcting term allows to improve the amplitude of the numerical solution. It comes out that even if the two systems are equivalent from a theoretical point of view, nothing of the kind is as far as the numerical simulation is concerned. Herein a numerical analysis is performed to show that as long as the propagation medium is smooth, both the models are equivalent but it is no more the case when the medium is associated to a quite strongly discontinuous velocity.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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